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A-xx US aicraft model designator for attack jets, such as the A-10.
AA Anti-Aircraft. Weapons used to down aircraft.
AAA Anti-Aircraft Artillery. Also "Triple A" or flak; heavy version of the AA gun, often mounted on an armored vehicle.
AAC Army Air Corps.
AAH Advanced Attack Helicopter.
AAM Air-to-Air Missile.
AB Afterburner capability; Airbase.
AFCS Automatic Flight Control System. Controls both the autopilot and auto-hover mechanisms.
AFV Armored Fighting Vehicle. Used in front line combat, essentially a tank with tires instead of treads.
AGL Above Ground Level. Measure of a plane's altitude above the terrain it is flying over. In other words, a plane may be flying at 1,500 ft off the ground.
AGM Air-to-Ground Missile.
AH-xx Attack helicopter, such as the AH-1 "Cobra" or the AH-64 "Apache".
Airfoil Curved wing or blade surface designed to produce lift when air passes over it.
Airframe Basic construction of the aircraft (doors, landing gear, seats, cabin, etc.)
AIM Air Intercept Missile.
ALARM Air-Launched Anti-Radiation Missile. Missile with active infrared transmitter in nose that home in on target emitting heat energy.
AMRAAM Advanced Medium-Range Air-to-Air Missile. Missile with active radar transmitter in nose that tracks target allowing "fire and forget" tactics.
Angels Altitude in thousands of feet. "angels Ten" indicates 10,000 ft of altitude.
AoA Angle of Attack. Aerodynamic angle formed between the choed of an airfoil and the direction of the relative wind.
AoT Angle off Tail. Angle between the flight path of an attacker and its target.
AP Armor Piercing, a type of ammunition
APC Armored Personnel Carrier. Armed, rough-terrain vehicle with tracks or wheels used to transport troops.
APR-39 Digital threat warning system used on helicopters and light aircraft.
APU Auxillary Power Unit.
ASE Aircraft survivability Equipment. An aircraft's defensive systems (i.e., RWR, jammers, chaff and flares).
Aspect Angle Angle from which a target is viewed. 45R means a view of the target's right wing from a 45 degree angle.
ASL Above Sea Level. Aircraft's altitude above sea level (in feet).
ASTOVL Advanced Short Take-Off and Vertical Landing. X-32 development program.
AT Anti-tank.
ATGM Anti-tank Guided Missile. Missile guided by lasers, wires, or infrared signals, invariably with a HEAT warhead.
ATGW Anti-Tank Guided Weapon, used by the British instead of ATGM.
ATGS Airborne Target Handoff Subsystem data link.
ATF Advanced Tactical Fighter. Group of prototypes that employ state of the art design, material, avionics and weaponry to enhance combat performance. Term come from the original name for the F-22 program.
Attack Jet A jet aircraft whose sole purpose is to attack ground targets. It's not designed for air-to-air combat.
AWACS Airborne Warning and Control System. Aircraft fitted with long range radar that provide tactical and target information to air and ground control units. Ususally big, slow and extremely high priority, both to defend and to attack.
BARCAP Barrier Combat Air Patrol. Fighters for a barrier to prevent enemy aircaft from entering a designatied airspace of approaching a friendly target. Generally set up along most probable corrididor of approach, often involves fighter relays.
B/N Bombadier/Navigator. US Navy term for co-pilot operator that handles nvifatoin and targeting operations on bombing missions.
Bandit Confirmed enemy aircraft.
Bogey Unidentified aircraft.
Battlesight Actually a sight confirmation of a cannon's optics, but in practice it means the sighting range where the  ammunition flight path matches the center cross-hairs on the sight. That is, the "straight line" limit of the   ammunition.                 
Blitzkrieg Fast-moving armored warfare. In German "blitz" means "lightning" ang "kreig" means "war".
BMP-x Boyevaya Mashina Pekhoty. Russian combat vehicle for transporting infantry; also called 'bimp'. The first  IFV was the BMP-1.
BTR-xx Bronetransportr (literally, armored personnel carrier). Russian wheeled armored personel carriers,  including the BTR-60, BTR-70 and BTR-80.
Buttoned Hache or hatches closed.
BVR Beyond Visual Range.
Communications, Command and Control. This is a common military buzzword for the process of  command in battle.
C³I Communications, Command, Control and Intelligence. a recent expresion of C³ (see above).
Canards Small fixed or variable wings in front of an airplane's main wings. Canard means 'duck' in French - the name comes from the pre-WWI plane that first featured these wings and was nicknamed 'The Duck'.
CAP Combat Air Patrol. Cruising at medium-to-high altitude over a certain area in search of enemy planes.
CAS Close Air Support. Dropping bombs in support of ground troops - also known as an air strike.
Center of Gravity Single, imaginary point where the resultant force of all weight forces occurs (also known as center of lift).
Chaff Strips of metal film released to confues and reflect signals from radar-guided weapons.
Chord Imaginary line that passes throught the leading and trailing edges of an airfoil. See angle of attack.
CM Countermeasures. Used by airborne vehicles in degense against air-to-air or SAM weapons (e.g., chaff, flares, jammers).
CO Commanding Officer. The commander of a military unit.
Coax Coaxial. Strictly speaking, a mounting that shares the same axis of moverment. It generally means a  machine-gun mounted beside a main gun. It does not move independantly. The gunner has his choice of  fiering the main gun or the coaxial machine-gun.
Composites Plastic or resin materials reinforced with other fibrous materials to create a stroing lightweight material that bends only in one direction.
Corner Speed Point at which maximum lift occurs with the least amount of airspeed.
CP/G Co-Pilot Gunner. SIts in the front seat of helicopters with tandem seating, and on the left in helicopters with side-by-side seating.
DASE Digital Auto-stablization Equipment.
DoD Department of Defense.
Drag Force that counteracts an object in motion through the air, such as air resistance.
ECM Electronic Countermeasures. Countermeasure that use the electromagnetic spectrum to confuse or defeat enemy radar and sensor systems.
EFM Enhanced Fighter Manueverability. Aircraft designed withthe airm of increasing turn and AoA performance during combat.
EW Electronic Warfare.
EW/GCI Early Warning/Ground Control Intercept.
FAC Forward Air Controller. An officer whith army and air force radios who coordinates air support for  front-line troops. Based on requests and what he can see, the FAC gives pilots specific instructions  about where and how to attack
FARP Forward Arming & Refueling Point. Highly mobile helicopter base; normally airlifted in by heavy
                              transport helicopters.
Flight Envelope Graphical guide showing the aircraft's limits in airspeed, altitude and G-load, and the aircraaft's current position within those limits.
FBW Fly by Wire. Computer-aided flight control - flight computer corrects pilor control input according to the flight ocndition data (altitude, airspeed) it receives, and uses this to adjust flight surfaces.
FitRep Fitness Report. A report by commander that recomends subordinates for promotion(or not,  as appropriate).
Flare Cartridge-shaped source of heat energy used to divert infrared-homing missiles.
FLIR Forward-Looking Infrared. Sensor that 'reads' the heat signatures of nearby objects. Similar to the thermal  imager but optimized to show ground detail and large objects.
FLOT Forward Line, Own Troops. Current designation for the front line closest to the enemy.
FO Forward Observer. A sergant or officer who requests artillery fire, spots and corrects its fall. He has radio  communication with the artillery, which is usually miles behind the front line.
FOB Forward Operating Base.
FOR Field of Regard. Total extent to which a comera or missile seeker head can pivot or 'look'.
FOV Field of View. Extent a camera or missile seeker head can 'see' in a given position.
GIB Guy-in-back. Slang term for WSO, RIO, and B/N.
GPS Global Positioning System. Satellite-based navigation system. Also Gunners Primary Sight.
HARM High-speed, Anti-Radiation Missile. Missile whose seeker head home in on radar-emitting sources.
HE High Explosive. A type of warhead used mainly in cannon shells.
HEAT High Explosive, Anti-tank. A "sharped charge" warhead designed to punch through steel armor. It's also  effective against non-armored targets.
HIRSS Hover Infrared Suppressor System.
HMG Heavy Machine-gun. Usually 12mm to 15mm bore diameter.
HUD Heads-Up Display. Glass mounted at the fornt of the cockpit. The pilot looks forward through the glass, and important combat and flight information is reflected onto the HUD and superimposed over his view of the outside world.
HVM High-Velocity Missile.
ICS Internal Communication System. Communications link between pilot, CP/G (and crew on some helicopters).
IFF Identification Friend or Foe. A coded message sent to a target's IFF transponder. If correct coded reply is received, the IFF interrogator reports 'friendly'.
IFV Infantry Fighting Vehicle. A lightly armored vehicle that carries a cannon turret, an ATGM, and a squad of  infantry.
IHADSS Integrated Helmet and Display Sight System. Coordinates sensor and targeting systems with pilot's head movements; computer displays flight info and targeting data over camera images in the helmet's eyepiece.
Image Intensifier A night vision aid that multiples the available light ti thousands of times its normal intensety. Also known  as a "starlight scope" because a small amount of moonlight or starlight is needed.
ILS Instrument Landing System. A radio device at airfields that assists polots in low-visability landings.
INS Internal Navigation System. Tracks a helicopter's current position and its desired position.
IR Infrared. Range of the electromagnetic spectrum where a signal's intensity is directly related to its heat signature.
Jammer Electronic countermeasure that emits microwaves to distort/confuse enemy radarscopes
Knot Measure of speed equal to one nautical mile per hour. See nautical mile or/and speedometer.
Lag Pursuit Refers to pointing an aircraft's nose just behind an enemy's flight path during a turn.
Lase The act of fiering a laser beam at a target.
Laser Light Amplification by Stimulated Emisions of Radiaton. A beam of coherent light.
LAW Light Anti-tank Weapon. A man-portable anti-tank rocket with a small HEAT warhead. It's notable for it's small size and weight.
LMG Light Machine-gun. Lightweight 5-8mm machine-gun that can be fired while standing, box or clip ammunition  supply is ussually smaller than the ammunition belts used in MMGs and HMGs.
LGB Laser-Guided Bomb.
Lead Pursuit Refers to pointing an aircraft's nose just ahead of an enemy's flight path during a turn.
Leading Refers to aiming just ahead of an enemy's flight path.
LOS Line of Sight. A straight, unblocked path between a missile's seeker head or designation system and its target.
LZ Landing Zone. Designated landing area for parachute or helicopter units.
Mach Speed of sound at sea level (760 ft/s) that is measured in multiples (Mach1, Mach 2, etc.)
MBT Main Battle Tank. Medium and heavy tanks.
MFD Multi-Function Display.
Mi-xx Helicopter designed by Mil bureau. This is the main design bureau for russian helicopters.
MIGCAP MIG Close Air Patrol. Patrol of an area insearch of enemy aircraft, no specified objective to protect.
Mortar A small, light quasi-artillery piece that fires "bomblets" in a high arc.
MRLS Multiple Rocket Launcher System.
NATO North American Treaty Organization. A mutual defense treaty that includes 16 nations. They are all European based with the exceptions of the United States and Canada.
Nautical Mile Aeronautical measurement of distance equal to 6,076ft. (1ft = 30.48cm)
NOE Nap of the Earth. Flight at very low altitude, using terrain for cover.
Obsolescent Outdated but not yet useless; not quite obsolete. Obsolesent equipment is often used in (theoretically)  less demanding roles.
Obsolete So outdated it's no longer useful, functionally useless.
OH-xx Observation Helicopter, US Military Designation.
Ordnance Expendable armament, such as missiles and ammunition.
PDF Panamanian Defense Force.
PGM Precision Guided Munition. 'Smart Bomb' (a guided bomb).
PNVS Pilot's Night Vision Sensor. Device that aids night vision by translating heat emissions into pictures.
Point of Impact Point along the leading edge of an airfoil where the air separates and flows over the top and bottom of the airfoil.
Radar Signature Indication of an aircraft's visability to radar, also called its radar cross section (RCS). Radar waves reflect off of vertical surfaces and sharp corners and create signatures on the detecting radarscope.
RAM Radar Absorbent Material. Material containing thousands of absorbant pockets that convert reader beams into heat or small electromagnetic fields, reducing overall radar cross-section.
Recon American slang for reconnaissance. Scouting enemy positions.
RCS Radar Cross Section.
RDF Rapid Deployment Force. Military force capable of quick movement, often used to respond to military hotspots.
Relative Wind Force created as an airfoil moves through the air. It equals the airfoil's forward velocity, but acts in the opposite direction. This is a method of looking at an airfoil moving through the air from a different frame of reference in which the airfoil is stationary and a wind equal to the actual forward velocity of the blade is passing over it.
Resultant Force Sum of all forces acting on an object. On a plane, the resultant force determines what direction the aircraft moves.
RIO Radar Intercept Officer. US Navy term for back-seat weapons and targeting systems operator.
RPG Reaktivniy Protivotankoviy Granatomet (Rocket anti-tank grenade launcher), also known in the west as  rocket-propeled grenade. These russian weaponshave a launche tube and separet HEAT warhead rockets.  Both are bulky but lightweight.
RWR Radar Warning Receiver. Warns pilot when he is being tracked by an enemy missile guidance system or air intercept radar.
RWS Radar While Search. Radar mode that uses continuous wave emissions to provide contact range and bearing at extremely long range.
S1 Staff Officer - Adjutant. The principal staff officer at a battalion headquarters. His duties include personnel  assignments.
S2 Staff Offices - Intelligence. One of the staff officers att a battalion headquarters. He finds and summorizes all  information about the enemy.
S3 Staff Officer - Operations & Training. One of te staff officers att a battalion headquarters. He organizes and  coordinates battalion operations.
S4 Staff Officer - Logistics. One of the staff officers at a battalion headquarters. He is responsible for all logistical  support (food, ammunition, fuel, repairs, replacements, etc.)
Sabot Common American term for "discarding sabot" type anti-tank ammunition, such as APFSDS (armor piersing,  fine stabelized, discarded sabot).
SACLOS Semi-Activated Command Line-Of-Sight. A common control system for anti-tank guided missiles. The gunner  simply keeps the sight on the target and the missile flies to that point.
SAM Surface-to-Air Missile. Any ground-launched missile designed to shoot down helicopters, jets, or other aircraft. The category includes small manpack SAMs such as the "Stinger", as well as large missiles on big transports or fixed emplasements.
SARH Semi-Active Radar Homing. Radar-guided missile that relies on aircraft radar guidance.
SEAD Suppression of Enemy Air Defenses. Misson to destroy enemy air defense units.
Speedometer A driving gauge that shows the current speed of the vehicle. US Army land vehicles are marked "kph"  (kilometers in hour); aircraft, including helicopters , are traditionally marked in kts (nautical miles per hour).  Conversions are 1.61 kph = 1 mph; 1.83 kph = 1 kt.
SSM Surface-to-Surface Missile.
Stadia Common abbreviation for Stadiametric, a type of gunsight where mil markings placed on the sight help the  gunner estimate range.
Stabilization In tanks, a systemwhere the gun barrel is kept stedy regardless of hull moverment. Full stabilization includes  horizontal stabilization (turret turns left and right to compensate for hull movement) and vertical stabilization  (barrel moves up and down as the hull rocks forward and back). Stabilization makes gunnery much easier.
If  the vehicle ride is especially rough, stabilization may not fully compensate.
Stall 'Loss of Lift' condition that occurs when the angle of attack is too steep for the airfoil to provide any lift. During a stall, the normally streamlined flow of air over the blade is disrupted.
STOVL Short Takeoff and Vertical Landing. Group of aircraft that redirects thrust using vanes, nozzles or ligt fans for yaw and/or pitch manueverability.
Su-xx Sukhoi aircraft; a russian aircraft design bureau that is generally known for its fighter-bomber aircraft.
Superelivation Elevating a gun barrel above a straight line to the target. With correct superelivation the shell arcs through the air for greater range. Superelivation is requires whenever a gun fires beond battlesight range.
T-xx Tank or Tankovyi, Russian MBTs use this model designation. Model numbers are roughly approximate the initial year of production.
Tachometer A drivers gauge that shows the engines RPMs (revolutions per minute, usually in the thousands). This reprisente the power output of the engine. If RPMs increase beond a "red line" level the engine can be damaged or destroyed.
TADS Target Aquisition and Designation System. System in Apache helicopters used to lock onto targets and to control laser designator.
TC Tank Commander, The senior crewman in a tank.
TF Task Force. A battalion or squadron sized combat formation composed of mixed combat elements.
TFR Terrain Following Radar.
TFS Tactical Fighter Squadron. A-10's are commonly assigned to these Air Force Units.
Thermal sight Also known as a Thermal Imager, it tranlates the heat signature of a objects into a visual image.
Thrust Horizontal, directional force that overcomes drag and powers the aircraft in the desired direction (usually forward, although some aircraft can direct thrust at an angle).
TOW Tube-launched, Optically-tracked, Wire-guided - an achronym used for the Army's standard heavy ATGM. The latest version is the "TOW 2".
Turbofan / Turbojet Jet engine that produces thrust by passing external air into the engine, moving it through several stages and igniting a fuel-air mixture.
Turn Rate Number of degrees per second a particular aircraft can turn. The higher the rate, the faster the turn
Turn Radius Radial distance required to complete a turn. The smaller the radius, the shorter the turn.
Turtle US Army slang term for new arrivals to Korea. Soldiers newly assigned to South Korea in-process at a building 12 feet away from the out-processing building (which takes a 12 month tour of duty to reach, hence the term).
TWS Track While Scan. Radar mode that uses pulse-Doppler radar to target a contact, providing detailed tracking information at short range.
HARM High-speed, Anti-Radiation Missile. Missile whose seeker head home in on radar-emitting sources.
HUD Heads-Up Display. Glass mounted at the fornt of the cockpit. The pilot looks forward through the glass, and important combat and flight information is reflected onto the HUD and superimposed over his view of the outside world.
HVM High-Velocity Missile.
Unbuttoned Among tankers, having a hatch or hatches open, usually with the crewman's head showing, sometines with arms and torso outside as well.
Vectored Thrust Thrust that is redirected using angled nozzles or vanes, or lift fans. Some aircraft (such as the F-22) can vector in the pitch axis; the XF-31 can vector in both the yaw/pitch axes.
VSI Vertical Speed Indicator.
Weapon Envelope Effective area of attack for a weapon. Enemies within this envelope are vulnerable to gun or missile fire.
WSO Weapons System Officer. US Navy term for back-seat weapons and targeting systems operator.
XO Executive Officer. The second-in-command of a military unit. Strictly speaking it applies only to command levels where the second-in-command is also an officer, but it's often used in other situations, such as "Meet my XO,  Platoon Sergant Smith."
Zero-zero Ejection seat that can save a crew member's life down to zero airspeed and zero altitude (full crash impact), as long as the aircraft is not inverted.
ZSU Zenitnaia Samokhudnaia Ustanovka (self-propelled anti-aircraft mount) translated from Russian.


US unit size

Section The smalest military organization above a single man or vehicle. Vehicle platoones are sometimes divided into two or three sections, each with two or three vehicles. Infantry squads are sometimes divided into two or three sections, each with two to four men.
Squad A military organisation of infantrymen subordinat to a plutoon. It contains 6 to 14 infantrymen, and is sometimes divided into two or more sections.
Platoon A military organization subordinate to a company. Platoones frequently inqlude two or three sections (of vehicles) or two to four squads (of infantry). Platoones typically have 25 to 50 infantrymen and/or 3 to 5 vehicles. Cavalry platoones are sometimes called "troop".
Company A military organization with two our more platoones. Companyies are controlled by a battalion HQ. Cavalry campanyies are sometimes calles "Squadrons" (se below). An infantry company has about 100 to 300 men. AFV companies have about 10 to 20 vehicles.
Battalion A military organization with two or more companies. A battalion is subordinate to a Brigade (if American) or Regiment (if Russian). It typically has 500 to 1.500 men.
Brigade In the US Army, military organization containing two or more battalions, and subordinate to a division. Althou a division have three or four combat brigade HQs, brigadestypically command about 3.000 to 6.000 men.
Division A military organization subordinate to a Corps (if US) or Army (if Russian). A Division have 10.000 to 25.000 men; American divisions are generally larger than Russian.
Corps A military organization with two or more divisions. In the US Army it is the largest battlefield command. The US Army has two Corps stationed in Europe (1989)

 

Battery A group of artillery pieces controled by a battalion HQ. Batteries traditionally have 4 to 8 guns, and may be divided into two sections.
Troop A Cavalry organization equivalent to a platoon (se above)
Squadron A Cavalry organization equivalent to a company (se above)
Regiment A military organization. In the Russian Army it is a combat organization subordinate to a Division. It has a number of battalion, traditionally three, and numbers 2.000 to 4.000 men. In the US Army it is not a combat organization, but instead an administrative one. One or more battalions are given a regiment name. However, a US regiment does not have a combat headquaters and nead not to fight togeather in battle. The exception is Armored Cavalry regiments. These independent brigade-size units are combat formations.